Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add PostHog/posthog-foss --skill authoring-log-alertsgit clone --depth 1 https://github.com/PostHog/posthog-fossWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/posthog/posthog-foss/authoring-log-alerts)<a href="https://agentmods.dev/skills/posthog/posthog-foss/authoring-log-alerts"><img src="https://agentmods.dev/badge/skills/posthog/posthog-foss/authoring-log-alerts/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/posthog/posthog-foss/authoring-log-alerts"><img src="https://agentmods.dev/badge/skills/posthog/posthog-foss/authoring-log-alerts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 4 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Prompt Injection · line 96 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 99 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 102 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 125 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00075 | $0.02618 |
| Opus 5 | $0.00037 | $0.01309 |
| Sonnet 5 | $0.00015 | $0.00524 |
| Haiku 4.5 | $0.00007 | $0.00262 |
Grade A, and why
authoring-log-alerts scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- authoring-log-alerts — 92% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Authoring log alerts
Authoring an alert is a measurement problem, not a guessing problem. You are not trying to be exhaustive — you are trying to land thresholds that fire 0–3 times per week on real production patterns, on services that matter.
When to use this skill
- The user asks to "set up alerts" / "suggest alerts" for their project.
- The user wants to evaluate whether a service is producing alertable signal.
- The user has just enabled log alerting and wants a starter set.
When not to use this skill
- Tuning an alert that already exists — that's a different job (use
posthog:logs-alerts-events-listto inspect fire/resolve cadence andposthog:logs-alerts-partial-updateto adjust). - Investigating an active incident — pull rows with
posthog:query-logs, don't author an alert mid-incident.
Tools
| Tool | Job | Where it fits |
|---|---|---|
posthog:logs-services |
Top-25 services in window with log_count, error_count, error_rate, sparkline. | Step 1 — triage. |
posthog:logs-attributes-list / posthog:logs-attribute-values-list |
Discover keys/values for narrower filters. | Step 2, optional. |
posthog:logs-count-ranges |
Adaptive time-bucketed counts for a filter. | Step 3 — baseline. |
posthog:logs-alerts-simulate-create |
Replay a draft config against -7d history with full state machine. |
Step 4 — validate. |
posthog:logs-alerts-create |
Persist the alert. | Step 5 — ship. |
posthog:logs-alerts-destinations-create |
Wire the alert to Slack, webhook, or Microsoft Teams. | Step 5: ship. |
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 201 lines · 75 tokens per session scan A 8971f099da1c
authoring-log-alerts is a skill published in the GitHub repository PostHog/posthog-foss (715 stars, last pushed today), licensed MIT. It adds 75 tokens to every session and 2,618 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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